Maintenance
Support
noun, verbal noun
いじ
維持 (いじ) Maintenance, Support
維持する (いじする) To Maintain
保持 (ほじ) Keep, Hold, Maintain, Retain
保護 (ほご、not on WK) Protection, Preservation, Conservation
保存 (ほぞん) Preservation, Conservation, Saving
Easy いじ Maintenance is the best.